Marine propeller and control method thereof

Abstract

The invention relates to the technical field of ship propellers, and discloses a ship propeller and a control method thereof, and the ship propeller comprises a base, a main rod seat, a steering driving mechanism, a main rod, a lifting driving mechanism, a lifting transmission wheel and a lifting power mechanism. The base is used for being connected with a ship body, the main rod base is rotationally connected with the base, and the steering driving mechanism is fixedly arranged on the base and used for driving the main rod base to rotate relative to the base. The main rod is in sliding connection with the main rod base and can slide in the axial direction of the main rod base relative to the main rod base. The lifting driving mechanism is fixedly arranged on the main rod base and used for driving the main rod to slide relative to the main rod base. The lifting transmission wheel is rotationally arranged on the circumferential face of the main rod base and is in transmission connection with the input end of the lifting driving mechanism. The lifting power mechanism is fixedly arranged on the base, the output end is in transmission connection with the lifting transmission wheel, and the lifting power mechanism is used for providing power for the lifting driving mechanism. According to the propeller, the cable of the lifting power mechanism can be prevented from being wound on the main rod, and the reliability of the propeller can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of marine propellers, and in particular to a marine propeller and a control method thereof. Background Art

[0002] Marine propulsion units, also known as outboard motors or outboard engines, are widely used to drive small boats. In order to improve the convenience of outboard motor operation, some outboard motors on the market use motors to drive the main pole for lifting or steering. In existing outboard motor solutions that can electrically control steering and main pole lifting, the lifting motor that drives the main pole will rotate with the main pole. When in use, the power supply line of the motor is easy to be entangled on the main pole, and it is easy to be broken by the motor when entangled. The cable will also rub against other mechanisms during steering, which will affect the life of the cable and thus the service life of the propeller. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a marine propeller, which can prevent the cable of the steering power mechanism from being entangled on the main rod and can increase the service life of the propeller.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: a marine propeller, comprising: a base, used to be connected to the hull; a main rod seat, rotatably connected to the base; a steering drive mechanism, fixedly arranged on the base, used to drive the main rod seat to rotate relative to the base; a main rod, slidably connected to the main rod seat, and can slide relative to the main rod seat along the axial direction of the main rod seat; a lifting drive mechanism, fixedly arranged on the main rod seat, used to drive the main rod to slide relative to the main rod seat; a lifting transmission wheel, rotatably arranged on the circumferential surface of the main rod seat, and drivingly connected to the input end of the lifting drive mechanism; a lifting power mechanism, fixedly arranged on the base, and the output end of which is drivingly connected to the lifting transmission wheel, used to provide power for the lifting drive mechanism.

[0005] Compared with the prior art, the beneficial effect of the present invention is that the lifting power mechanism is fixedly arranged on the base, and the lifting drive mechanism is provided with power by rotating the lifting transmission wheel arranged on the main rod seat, thereby preventing the lifting power mechanism from rotating together with the main rod, and preventing the power supply cable of the lifting power mechanism from being entangled on the main rod, or being damaged by friction with other mechanisms during the rotation of the main rod. The marine propeller has a better service life and reliability.

[0006] In the above-mentioned marine propeller, the steering drive mechanism includes a steering motor and a steering drive wheel, the steering drive wheel is fixedly connected to the circumference of the main rod seat, and the output shaft of the steering motor is drivingly connected to the steering drive wheel.

[0007] In the above-mentioned marine propeller, the steering drive wheel is a gear, the steering drive mechanism also includes a steering driving wheel, the steering driving wheel is a gear, the output shaft of the steering drive motor is transmission-connected to the steering driving wheel, and the steering driving wheel is meshed with the steering drive wheel.

[0008] In the above-mentioned marine propeller, the lifting transmission wheel is a gear, the lifting power mechanism includes a lifting motor and a lifting driving wheel, the output shaft of the lifting motor is drivingly connected to the lifting driving wheel, the lifting driving wheel is a gear, and the lifting driving wheel is meshed with the lifting transmission wheel.

[0009] The above-mentioned marine propeller, the lifting drive mechanism includes an input shaft, an output shaft and a reversing transmission mechanism, the input shaft and the output shaft are both rotatably arranged on the main rod seat, the direction of the input shaft is parallel to the main rod, and the direction of the output shaft is perpendicular to the main rod, one end of the input shaft is provided with an input wheel, the other end of the input shaft is transmission-connected to the output shaft through the reversing transmission mechanism, the input wheel is transmission-connected to the lifting transmission wheel, a rack or a chain is provided on the circumferential surface of the main rod, a window is provided on the circumferential surface of the main rod seat for exposing the rack or the chain, a lifting gear or a lifting sprocket is provided on the output shaft, and the lifting gear or the lifting sprocket can pass through the window and mesh with the rack or the chain.

[0010] In the above-mentioned marine propeller, the reversing transmission mechanism includes a first bevel gear and a second bevel gear, the first bevel gear is arranged at an end of the input shaft facing away from the input wheel, the second bevel gear is arranged at one end of the output shaft, and the first bevel gear is meshed with the second bevel gear.

[0011] In the above-mentioned marine propeller, a chain is arranged on the circumferential surface of the main rod seat, two ends of the chain are fixedly connected to two ends of the main rod, and a tensioning mechanism is fixedly arranged on the main rod seat, and the chain passes through the tensioning mechanism.

[0012] The above-mentioned marine propeller, the tensioning mechanism includes a tensioning shaft, a slide, a pressure wheel and a pressure wheel rotating shaft, the slide is fixedly arranged on one side of the window, the pressure wheel rotating shaft is slidably connected to the slide, the pressure wheel is rotatably arranged on the pressure wheel rotating shaft, the tensioning shaft is rotatably arranged on the main rod seat, the tensioning shaft is perpendicular to the main rod, a tensioning sprocket is arranged on the tensioning shaft, and an elastic member is arranged between the tensioning shaft and the pressure wheel rotating shaft.

[0013] In the above-mentioned marine propeller, the tensioning sprocket and the lifting sprocket are both one-way clutch sprockets.

[0014] A control method for the above-mentioned marine propeller, when driving the main rod to rise and fall, the steering drive mechanism works in a braking mode to prevent the steering drive wheel from rotating, and the lifting drive mechanism drives the lifting transmission wheel to rotate; when driving the main rod to turn, the steering drive mechanism and the lifting drive mechanism work synchronously, so that the steering drive wheel and the lifting transmission wheel rotate in the same direction and at the same speed.

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a marine propulsion device according to an embodiment of the present invention;

[0017] Figure 2 A top view of a marine propeller according to an embodiment of the present invention;

[0018] Figure 3 is a schematic diagram of a steering drive mechanism of a marine propeller according to an embodiment of the present invention;

[0019] Figure 4 A schematic diagram of a lifting drive mechanism of a marine propeller according to an embodiment of the present invention;

[0020] Figure 5 is a schematic diagram of a tensioning mechanism according to an embodiment of the present invention;

[0021] Figure 6 Schematic diagram of the chain running of the tensioning mechanism according to an embodiment of the present invention.

[0022] Description of Figure Numbers:

[0023] 100 base, 110 connecting seat, 120 propulsion box, 200 main rod, 210 control handle, 300 propeller, 400 main rod seat, 410 steering drive wheel, 500 lifting drive box, 510 input shaft, 511 input wheel, 520 output shaft, 521 lifting sprocket, 530 reversing transmission mechanism, 531 first bevel tooth, 532 second bevel tooth, 540 tensioning mechanism, 541 sliding seat, 542 pressure wheel rotating shaft, 543 pressure wheel, 544 elastic member, 545 tensioning shaft, 546 tensioning sprocket, 600 lifting transmission wheel, 700 steering drive mechanism, 710 steering motor, 720 steering driving wheel, 730 steering reducer, 800 lifting power mechanism, 810 lifting motor, 820 lifting driving wheel, 830 lifting reducer. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below. Figure 1 and Figure 3The embodiment of the present invention provides a marine propeller, including a base 100, a main rod seat 400, a steering drive mechanism 700, a main rod 200, a lifting drive mechanism, a lifting transmission wheel 600 and a lifting power mechanism 800. The base 100 is used to connect with the hull, the main rod seat 400 is rotatably arranged on the base 100, and the steering drive mechanism 700 is fixedly arranged on the base 100, and is used to drive the main rod seat 400 to rotate relative to the base 100. The main rod 200 is slidably connected with the main rod seat 400, and can slide along the axial direction of the main rod seat 400 relative to the main rod seat 400. The upper end of the main rod 200 is provided with a control handle 210, and the lower end is provided with a propeller 300. The lifting drive mechanism is fixedly arranged on the main rod seat 400, and is used to drive the main rod 200 to slide relative to the main rod seat 400. The lifting transmission wheel 600 is rotatably arranged on the circumferential surface of the main rod seat 400, and is transmission-connected with the input end of the lifting drive mechanism. The lifting power mechanism 800 is fixedly arranged on the base 100, and the output end is drivingly connected to the lifting transmission wheel 600 for providing power for the lifting drive mechanism.

[0025] In the marine propulsion device of the embodiment of the present invention, when the main rod 200 needs to be driven to rise and fall, the steering drive mechanism 700 works in the braking mode, hindering the rotation of the main rod seat 400, and at the same time, the lifting power mechanism 800 drives the lifting transmission wheel 600 to rotate, so that the lifting transmission wheel 600 rotates relative to the main rod seat 400, thereby transmitting the power output by the lifting power mechanism 800 to the lifting drive mechanism, driving the main rod 200 to rise and fall. When the main rod 200 needs to be driven to rotate, the steering drive mechanism 700 drives the main rod seat 400 to rotate, and the lifting power mechanism 800 simultaneously drives the lifting transmission wheel 600 to rotate synchronously with the main rod seat 400 in the same direction and at the same speed, so that the lifting transmission wheel 600 is stationary relative to the main rod seat 400, so that power will not be transmitted to the lifting drive mechanism, and only the steering of the main rod 200 is realized, and the main rod 200 will not be driven to rise and fall at the same time. In the marine propeller, the lifting power mechanism 800 transmits power to the lifting drive mechanism by rotating the lifting transmission wheel 600 arranged on the main rod seat 400, so that the lifting power mechanism 800 will not rotate with the main rod 200 when the main rod 200 turns, and the power supply cable of the lifting power mechanism 800 can be prevented from being entangled on the main rod 200, and the cable is pulled off due to entanglement during the turning process, or the power supply cable is worn due to friction with other mechanisms as the main rod 200 rotates. The marine propeller can improve the reliability and service life of the lifting power mechanism 800, and the lifting power mechanism 800 and the steering drive mechanism 700 can be fixed on the base 100, which is convenient for maintenance.

[0026] It is understandable that the lifting transmission wheel 600 can be a sprocket, a gear, a synchronous wheel or a friction wheel, and accordingly, the output end of the lifting power mechanism 800 and the input end of the lifting drive mechanism are connected to the lifting transmission wheel 600 through a chain, a gear set, a synchronous belt or a friction wheel. The main rod seat 400 and the main rod 200 can be slidably connected through a slide rail or a slide groove.

[0027] Reference Figure 2 In this embodiment, a slide groove is provided on the circumference of the main rod 200, and the slide groove is provided on the circumference of the main rod 200 along the axial direction of the main rod 200. The main rod seat 400 is a cylinder, and a boss matching the slide groove on the main rod 200 is provided on the inner wall of the cylinder. When the main rod 200 slides relative to the main rod seat 400, the boss slides along the slide groove.

[0028] Reference Figure 1 In this embodiment, the base 100 includes a connection seat 110 and a propulsion box 120. The connection seat 110 is used to connect to the hull and is arranged at the bow or stern of the ship. The propulsion box 120 is rotatably connected to the connection seat 110, and the main rod seat 400 is rotatably connected to the propulsion box 120. The steering drive mechanism 700, the lifting drive mechanism and the lifting power mechanism 800 are all arranged in the propulsion box 120. The propulsion box 120 can rotate relative to the connection seat 110, so that the main rod 200 can switch between the vertical state and the horizontal state, which is convenient for storing the propeller 300 at the bottom of the hull when moored.

[0029] Reference Figure 3 The steering drive mechanism 700 includes a steering motor 710, a steering drive wheel 410 and a steering active wheel 720, and the lifting power mechanism 800 includes a lifting motor 810 and a lifting active wheel 820. The steering drive wheel 410 is fixedly arranged on the circumference of the main rod seat 400, and the steering motor 710 and the lifting motor 810 are arranged on the bottom plate of the propulsion box 120 through a motor bracket. The output shaft 520 of the steering motor 710 is connected to the steering active wheel 720 through a steering reducer 730, and the output shaft 520 of the lifting motor 810 is connected to the lifting active wheel 820 through a lifting reducer 830. The steering active wheel 720 is connected to the steering drive wheel 410, and the lifting active wheel 820 is connected to the lifting drive wheel 600. It can be understood that the steering drive wheel 410 and the steering active wheel 720 can be gears, sprockets, synchronous wheels or friction wheels. In this embodiment, the steering drive wheel 410 , the steering active wheel 720 , the lifting transmission wheel 600 and the lifting active wheel 820 are all gears. The steering drive wheel 410 meshes with the steering active wheel 720 , and the lifting transmission wheel 600 meshes with the lifting active wheel 820 .

[0030] Reference Figure 3 and Figure 4In this embodiment, the lifting drive mechanism is arranged in the lifting drive box 500, and the lifting drive box 500 is fixedly arranged on the main rod seat 400. The lifting drive mechanism includes an input shaft 510, an output shaft 520 and a reversing transmission mechanism 530. The input shaft 510 and the output shaft 520 are both rotatably arranged in the lifting drive box 500, the direction of the input shaft 510 is parallel to the main rod 200, and the direction of the output shaft 520 is perpendicular to the main rod 200. An input wheel 511 is arranged at the lower end of the input shaft 510, and the input wheel 511 is transmission-connected with the lifting transmission wheel 600. In this embodiment, the input wheel 511 is a gear meshing with the lifting transmission wheel 600, and the input wheel 511 and the lifting driving wheel 820 are staggered by a certain distance in the axial direction of the main rod 200, so as to avoid the collision between the input wheel 511 and the lifting driving wheel 820 when the lifting drive mechanism rotates with the main rod 200. The upper end of the input shaft 510 is connected to the output shaft 520 through a reversing transmission mechanism 530, and the reversing transmission mechanism 530 can be composed of a bevel gear or a worm gear. A rack or a chain is fixedly arranged on the circumference of the main rod 200, and the rack or the chain is arranged along the axial direction of the main rod 200. The inner wall of the main rod seat 400 is provided with an avoidance groove to provide a space for the rack or the chain to move. The circumference of the main rod seat 400 is provided with a window for the rack or the chain to be exposed. The output shaft 520 is correspondingly provided with a lifting gear or a lifting sprocket 521, and the lifting gear or the lifting sprocket 521 can pass through the window to mesh with the rack or the chain.

[0031] Reference Figure 4 and Figure 6 In this embodiment, a chain is arranged on the circumference of the main rod 200, and the two ends of the chain are connected to the two ends of the main rod 200. Compared with the rack, the chain is less likely to accommodate foreign objects, which can avoid the lifting jam caused by accommodating foreign objects, and is easy to maintain. The reversing transmission mechanism 530 includes a first bevel tooth 531 and a second bevel tooth 532, the first bevel tooth 531 is arranged at the upper end of the input shaft 510, and the second bevel tooth 532 is arranged on the output shaft 520, and the first bevel tooth 531 and the second bevel tooth 532 are meshed. The chain on the main rod 200 partially protrudes from the window of the main rod seat 400, and the protruding part bypasses the lifting sprocket 521. When the lifting transmission wheel 600 rotates relative to the main rod seat 400, it drives the input wheel 511 to rotate, thereby driving the lifting sprocket 521 to rotate through the reversing transmission mechanism 530, so as to drive the chain to be lifted and lowered, thereby realizing the driving of the lifting and lowering of the main rod 200.

[0032] Reference Figures 4 to 6In this embodiment, in order to keep the chain tensioned and prevent the chain from separating from the lifting sprocket 521, a tensioning mechanism 540 is provided on the main rod seat 400. The tensioning mechanism 540 is provided on one side of the window, and the portion of the chain protruding from the window passes through the tensioning mechanism 540. The tensioning mechanism 540 includes a tensioning shaft 545, a slide 541, a pressure wheel 543 and a pressure wheel rotating shaft 542. The slide 541 is fixedly provided on one side of the window, the pressure wheel rotating shaft 542 is slidably connected to the slide 541, and the pressure wheel 543 is rotatably provided on the pressure wheel rotating shaft 542. The tensioning shaft 545 is rotatably disposed in the lifting drive box 500. The tensioning shaft 545 is perpendicular to the main rod 200. A tensioning sprocket 546 is disposed on the tensioning shaft 545. An elastic member 544 is disposed between the tensioning shaft 545 and the pressure wheel shaft 542. The spacing between the pressure wheel shaft 542 and the tensioning shaft 545 is controlled by the elastic member 544 to keep the chain tensioned. The slide seat 541 includes an L-shaped slide plate. The two L-shaped slide plates are respectively disposed on both sides of the window. The slide plate is provided with a waist-shaped hole. The direction of the waist-shaped hole is parallel to the main rod 200. The pressure wheel shaft 542 passes through the waist-shaped holes of the two slide plates and can slide along the waist-shaped holes. It can be understood that the elastic member 544 can include two compression springs or tension springs, which can be selected according to the chain running method. Refer to Figure 6 In this embodiment, the chain passes through the tensioning mechanism 540 and the lifting sprocket 521 as shown in the figure, and the elastic member 544 is a tension spring.

[0033] In some embodiments, in order to prevent the propeller 300 from being damaged when it hits a reef, the lifting sprocket 521 and the tensioning sprocket 546 are one-way clutch sprockets. When the propeller 300 hits a reef, the one-way clutch sprocket will not jam the chain, and the main rod 200 can be lifted upward under the action of external force, thereby preventing the propeller 300 from being damaged by foreign objects such as reefs.

[0034] When the marine propeller of the embodiment of the present invention needs to drive the main rod 200 to turn, the lifting motor 810 and the steering motor 710 respectively drive the lifting transmission wheel 600 and the steering drive wheel 410 to rotate synchronously at the same speed and direction, so that the lifting transmission wheel 600 is stationary relative to the steering drive wheel 410, that is, it is stationary relative to the main rod seat 400, thereby remaining relatively stationary with the input wheel 511 and will not drive the main rod 200 to be lifted or lowered; when it is necessary to drive the main rod 200 to be lifted or lowered, the steering motor 710 works in the braking mode, and the steering drive wheel 410 is braked, so that the lifting motor 810 can drive the lifting transmission wheel 600 to rotate relative to the active rod, thereby driving the input wheel 511 to rotate, and driving the chain to be lifted or lowered through the lifting sprocket 521, so as to drive the main rod 200 to be lifted or lowered.

[0035] It is understandable that, in some embodiments, in order to achieve the lifting and turning of the main rod 200 at the same time, the lifting and turning transmission wheel 600 can be driven to rotate in the opposite direction relative to the turning driving wheel 410 or to rotate in the same direction with a certain speed difference.

[0036] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.

[0037] In the description of the present invention, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A marine propeller, characterized in that: include: A base (100) for connecting to a hull; A main rod seat (400) is rotatably connected to the base (100); A steering drive mechanism (700) is fixedly disposed on the base (100) and is used to drive the main rod seat (400) to rotate relative to the base (100); A main rod (200) is slidably connected to the main rod seat (400) and can slide relative to the main rod seat (400) along the axial direction of the main rod seat (400); A lifting drive mechanism, fixedly arranged on the main rod seat (400), and used for driving the main rod (200) to slide relative to the main rod seat (400); A lifting transmission wheel (600) is rotatably disposed on the peripheral surface of the main rod seat (400) and is drivingly connected to the input end of the lifting drive mechanism; A lifting power mechanism (800) is fixedly arranged on the base (100), and an output end thereof is drivingly connected to the lifting transmission wheel (600) for providing power to the lifting drive mechanism.

2. The marine propeller according to claim 1, characterized in that: The steering drive mechanism (700) comprises a steering motor (710) and a steering drive wheel (410); the steering drive wheel (410) is fixedly connected to the circumference of the main rod seat (400); and the output shaft (520) of the steering motor (710) is drivingly connected to the steering drive wheel (410).

3. The marine propeller according to claim 2, characterized in that: The steering drive wheel (410) is a gear, and the steering drive mechanism (700) further comprises a steering driving wheel (720), the steering driving wheel (720) is a gear, the output shaft (520) of the steering drive motor is transmission-connected to the steering driving wheel (720), and the steering driving wheel (720) is meshed with the steering drive wheel (410).

4. The marine propeller according to claim 1, characterized in that: The lifting transmission wheel (600) is a gear, the lifting power mechanism (800) comprises a lifting motor (810) and a lifting driving wheel (820), the output shaft (520) of the lifting motor (810) is drivingly connected to the lifting driving wheel (820), the lifting driving wheel (820) is a gear, and the lifting driving wheel (820) is meshed with the lifting transmission wheel (600).

5. The marine propeller according to claim 1, characterized in that: The lifting drive mechanism comprises an input shaft (510), an output shaft (520) and a reversing transmission mechanism (530); the input shaft (510) and the output shaft (520) are both rotatably arranged on the main rod seat (400); the direction of the input shaft (510) is parallel to the main rod (200); the direction of the output shaft (520) is perpendicular to the main rod (200); one end of the input shaft (510) is provided with an input wheel (511); the other end of the input shaft (510) is connected to the main rod seat (400) by the reversing transmission mechanism (530); The transmission mechanism (530) is in transmission connection with the output shaft (520), the input wheel (511) is in transmission connection with the lifting transmission wheel (600), a rack or a chain is arranged on the circumference of the main rod (200), a window is provided on the circumference of the main rod seat (400) for exposing the rack or the chain, a lifting gear or a lifting sprocket (521) is arranged on the output shaft (520), and the lifting gear or the lifting sprocket (521) can pass through the window and mesh with the rack or the chain.

6. The marine propeller according to claim 5, characterized in that: The reversing transmission mechanism (530) comprises a first bevel tooth (531) and a second bevel tooth (532), wherein the first bevel tooth (531) is arranged at an end of the input shaft (510) facing away from the input wheel (511), and the second bevel tooth (532) is arranged at an end of the output shaft (520), and the first bevel ruler is meshed with the second bevel tooth (532).

7. The marine propeller according to claim 5, characterized in that: A chain is arranged on the circumferential surface of the main rod seat (400), and two ends of the chain are fixedly connected to two ends of the main rod (200). A tensioning mechanism (540) is fixedly arranged on the main rod seat (400), and the chain passes through the tensioning mechanism (540).

8. The marine propeller according to claim 7, characterized in that: The tensioning mechanism (540) includes a tensioning shaft (545), a slide (541), a pressure wheel (543) and a pressure wheel rotating shaft (542); the slide (541) is fixedly arranged on one side of the window; the pressure wheel rotating shaft (542) is slidably connected to the slide (541); the pressure wheel (543) is rotatably arranged on the pressure wheel rotating shaft (542); the tensioning shaft (545) is rotatably arranged on the main rod seat (400); the tensioning shaft (545) is perpendicular to the main rod (200); a tensioning sprocket (546) is arranged on the tensioning shaft (545); and an elastic member (544) is arranged between the tensioning shaft (545) and the pressure wheel rotating shaft (542).

9. The marine propeller according to claim 8, characterized in that: The tensioning sprocket (546) and the lifting sprocket (521) are both one-way clutch sprockets.

10. A method for controlling a marine propeller according to any one of claims 1 to 9, characterized in that: When the main rod (200) is driven to rise and fall, the steering drive mechanism (700) works in a braking mode to prevent the steering drive wheel (410) from rotating, and the lifting drive mechanism drives the lifting transmission wheel (600) to rotate; when the main rod (200) is driven to turn, the steering drive mechanism (700) and the lifting drive mechanism work synchronously, so that the steering drive wheel (410) and the lifting transmission wheel (600) rotate in the same direction and at the same speed.

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